Toothbrush



FIG. 1 is a perspective view of the embodiment of a toothbrush, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines showing a head and features on the handle illustrate portions of the toothbrush that form no part of the claimed design. 

The ornamental design for a toothbrush, as shown and described. 